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post #1 of Old 12-06-2006 Thread Starter
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How to size rope

The broker who sold us our boat suggested that we buy a spool of 3/4" rope and cut it into the variety of lenghts needed for different docking/rafting/slip situations. We went to a marine store and looked at a spool of 3/4" rope that was sitting beside a spool of 5/8" rope. The 3/4" looked huge. I'm sure the 3/4measurement is when the rope is stretched with rated load, but man, it looked like it would be impossible to knot and/or attach to cleats. The 5/8" looked like it would be difficult to work with but not as bad as the larger size. I could use some advice about purchasing the 5/8" rope as opposed to the 3/4". My boat is a 30,000#, 47' cruiser and yes it is high and will catch a lot of wind. I know there is no definitive answer to this since conditions exist that will cause even the 3/4" to fail, but generally, will the 5/8" rope be adequate? Thanks in advance for your thoughts.
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